/* ==========================================================================
   Vasudha Pharma — Milestones & Corporate Journey Roadmap
   Alternating Vertical Timeline with Thematic Filtering & Metrics
   Emerald Green Theme Edition
   ========================================================================== */

:root {
  --mr-primary: #0E8F6C;
  --mr-primary-dark: #09634B;
  --mr-primary-light: #ecfdf5;
  --mr-primary-border: #a7f3d0;
  --mr-glow: rgba(14, 143, 108, 0.2);
  --mr-bg-card: #ffffff;
  --mr-text-main: #0f172a;
  --mr-text-muted: #475569;
  --mr-border-card: #e2e8f0;
}

/* Section Container & Spacing */
.milestones-section {
  padding: 80px 0 96px;
  background: #ffffff;
  position: relative;
  overflow: hidden;
}

.milestones-section .section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--mr-primary);
  margin-bottom: 10px;
}

.milestones-section h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--mr-text-main);
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  line-height: 1.25;
}

.milestones-section .milestones-intro-desc {
  font-size: 16px;
  line-height: 1.65;
  color: var(--mr-text-muted);
  max-width: 760px;
  margin: 0 0 36px;
}

/* ==========================================================================
   1. Quick-Glance Milestone KPI Stats Strip
   ========================================================================== */
.mr-kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 48px;
}

.mr-kpi-card {
  background: linear-gradient(135deg, #ffffff 0%, var(--mr-primary-light) 100%);
  border: 1px solid var(--mr-primary-border);
  border-radius: 14px;
  padding: 22px 20px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(14, 143, 108, 0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.mr-kpi-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(14, 143, 108, 0.12);
}

.mr-kpi-val {
  font-size: 32px;
  font-weight: 800;
  color: var(--mr-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 6px;
}

.mr-kpi-lbl {
  font-size: 13px;
  font-weight: 600;
  color: #334155;
  line-height: 1.4;
}

.mr-kpi-sub {
  font-size: 11.5px;
  color: #64748b;
  margin-top: 3px;
}

/* ==========================================================================
   2. Thematic Filter Tabs
   ========================================================================== */
.mr-filters-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 56px;
  padding: 8px 12px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 40px;
  max-width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.mr-filter-btn {
  border: none;
  background: transparent;
  color: #475569;
  font-size: 13.5px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 30px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: all 0.2s ease;
}

.mr-filter-btn:hover {
  color: var(--mr-primary);
  background: rgba(14, 143, 108, 0.08);
}

.mr-filter-btn.active {
  background: var(--mr-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(14, 143, 108, 0.28);
}

.mr-filter-count {
  display: inline-block;
  background: rgba(255, 255, 255, 0.25);
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 12px;
  font-weight: 700;
}

.mr-filter-btn:not(.active) .mr-filter-count {
  background: #e2e8f0;
  color: #475569;
}

/* ==========================================================================
   3. Alternating Vertical Timeline Roadmap (Desktop Layout)
   ========================================================================== */
.mr-timeline-wrap {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 0 40px;
}

/* Central Timeline Spine */
.mr-timeline-wrap::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--mr-primary) 0%, #10b981 60%, var(--mr-primary-dark) 100%);
  border-radius: 4px;
  box-shadow: 0 0 14px var(--mr-glow);
  z-index: 1;
}

/* Milestone Item Row */
.mr-item {
  position: relative;
  width: 50%;
  padding: 0 40px 48px;
  box-sizing: border-box;
  z-index: 2;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.mr-item.is-hidden {
  display: none !important;
}

/* Left vs Right Alignment */
.mr-item.left {
  left: 0;
  text-align: right;
  padding-left: 0;
  padding-right: 48px;
}

.mr-item.right {
  left: 50%;
  text-align: left;
  padding-right: 0;
  padding-left: 48px;
}

/* Central Marker Pin / Node */
.mr-pin {
  position: absolute;
  top: 14px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #ffffff;
  border: 4px solid var(--mr-primary);
  box-shadow: 0 0 0 4px rgba(14, 143, 108, 0.2), 0 4px 10px rgba(0, 0, 0, 0.1);
  z-index: 3;
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.mr-item.left .mr-pin {
  right: -10px;
}

.mr-item.right .mr-pin {
  left: -10px;
}

.mr-item:hover .mr-pin {
  transform: scale(1.3);
  background: var(--mr-primary);
  border-color: #ffffff;
  box-shadow: 0 0 0 6px rgba(14, 143, 108, 0.3);
}

/* Milestone Card Box */
.mr-card {
  background: #ffffff;
  border: 1px solid var(--mr-border-card);
  border-radius: 16px;
  padding: 24px 26px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
  text-align: left;
  position: relative;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}

.mr-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(14, 143, 108, 0.12);
  border-color: var(--mr-primary-border);
}

/* Direction Arrow Pointer */
.mr-card::before {
  content: '';
  position: absolute;
  top: 18px;
  width: 14px;
  height: 14px;
  background: #ffffff;
  border: 1px solid var(--mr-border-card);
  transform: rotate(45deg);
  z-index: 1;
  transition: border-color 0.25s ease;
}

.mr-item.left .mr-card::before {
  right: -8px;
  border-left: none;
  border-bottom: none;
}

.mr-item.right .mr-card::before {
  left: -8px;
  border-right: none;
  border-top: none;
}

.mr-card:hover::before {
  border-color: var(--mr-primary-border);
}

/* Card Header: Year Pill & Category Badge */
.mr-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.mr-year-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 800;
  color: var(--mr-primary);
  background: var(--mr-primary-light);
  border: 1px solid var(--mr-primary-border);
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.02em;
}

.mr-cat-badge {
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Badge Color Themes */
.mr-badge-corporate {
  background: #f1f5f9;
  color: #475569;
}
.mr-badge-regulatory {
  background: #fef3c7;
  color: #92400e;
}
.mr-badge-facility {
  background: #e0f2fe;
  color: #0369a1;
}
.mr-badge-rnd {
  background: #f3e8ff;
  color: #7e22ce;
}
.mr-badge-esg {
  background: #dcfce7;
  color: #15803d;
}

/* Card Headline & Content */
.mr-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--mr-text-main);
  line-height: 1.35;
  margin: 0 0 8px;
}

.mr-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mr-text-muted);
  margin: 0 0 14px;
}

/* Highlight Key Tag / Metric Footer */
.mr-metric-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--mr-primary-dark);
  background: #f8fafc;
  border: 1px dashed var(--mr-primary-border);
  padding: 5px 12px;
  border-radius: 8px;
}

.mr-metric-tag svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
  flex-shrink: 0;
}

/* ==========================================================================
   4. Responsive Breakpoints (Mobile & Tablet)
   ========================================================================== */
@media (max-width: 900px) {
  .mr-kpi-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
}

@media (max-width: 768px) {
  .milestones-section {
    padding: 60px 0 72px;
  }

  .milestones-section h2 {
    font-size: 27px;
  }

  /* Reposition Central Line to Left Edge */
  .mr-timeline-wrap::before {
    left: 20px;
    transform: none;
  }

  /* Stack All Milestone Items to Full Width on Right of Spine */
  .mr-item {
    width: 100% !important;
    left: 0 !important;
    padding: 0 0 36px 54px !important;
    text-align: left !important;
  }

  .mr-item .mr-pin {
    left: 11px !important;
    right: auto !important;
  }

  .mr-item .mr-card::before {
    left: -8px !important;
    right: auto !important;
    border-right: none !important;
    border-top: none !important;
    border-left: 1px solid var(--mr-border-card) !important;
    border-bottom: 1px solid var(--mr-border-card) !important;
  }

  .mr-filters-bar {
    border-radius: 20px;
    justify-content: flex-start;
    overflow-x: auto;
    width: 100%;
    max-width: 100%;
    padding: 6px 8px;
  }

  .mr-filter-btn {
    font-size: 12.5px;
    padding: 6px 14px;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .mr-kpi-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .mr-kpi-val {
    font-size: 28px;
  }

  .mr-card {
    padding: 18px 18px;
  }

  .mr-title {
    font-size: 16px;
  }
}